145032513203221 has 6 divisors (see below), whose sum is σ = 168711290869110. Its totient is φ = 124313582745576.

The previous prime is 145032513203209. The next prime is 145032513203243. The reversal of 145032513203221 is 122302315230541.

It can be written as a sum of positive squares in only one way, i.e., 141465095088100 + 3567418115121 = 11893910^2 + 1888761^2 .

It is not a de Polignac number, because 145032513203221 - 2¹³ = 145032513195029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145032513207221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1479923604066 + ... + 1479923604163.

It is an arithmetic number, because the mean of its divisors is an integer number (28118548478185).

Almost surely, 2^{145032513203221} is an apocalyptic number.

It is an amenable number.

145032513203221 is a deficient number, since it is larger than the sum of its proper divisors (23678777665889).

145032513203221 is an equidigital number, since it uses as much as digits as its factorization.

145032513203221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2959847208243 (or 2959847208236 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 145032513203221 its reverse (122302315230541), we get a palindrome (267334828433762).

The spelling of 145032513203221 in words is "one hundred forty-five trillion, thirty-two billion, five hundred thirteen million, two hundred three thousand, two hundred twenty-one".